package com.encryption.dao;

import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.criterion.Example;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.encryption.model.Role;
 
/**
 * A data access object (DAO) providing persistence and search support for Role
 * entities. Transaction control of the save(), update() and delete() operations
 * can directly support Spring container-managed transactions or they can be
 * augmented to handle user-managed Spring transactions. Each of these methods
 * provides additional information for how to configure it for the desired type
 * of transaction control.
 * 
 * @see com.encryption.model.Role
 * @author MyEclipse Persistence Tools
 */

public class RoleDAO extends BaseHibernateDAO {
	private static final Logger log = LoggerFactory.getLogger(RoleDAO.class);
	// property constants
	public static final String NAME = "name";

	public void save(Role transientInstance) {
		log.debug("saving Role instance");
		try {
			getSession().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(Role persistentInstance) {
		log.debug("deleting Role instance");
		try {
			getSession().delete(persistentInstance);
			getSession().flush();
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public Role findById(java.lang.Integer id) {
		log.debug("getting Role instance with id: " + id);
		try {
			Role instance = (Role) getSession().get(
					"com.encryption.model.Role", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Role instance) {
		log.debug("finding Role instance by example");
		try {
			List results = getSession()
					.createCriteria("com.encryption.model.Role")
					.add(Example.create(instance)).list();
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {
		log.debug("finding Role instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Role as model where model."
					+ propertyName + "= ?";
			Query queryObject = getSession().createQuery(queryString);
			queryObject.setParameter(0, value);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByName(Object name) {
		return findByProperty(NAME, name);
	}

	public List findAll() {
		log.debug("finding all Role instances");
		try {
			String queryString = "from Role";
			Query queryObject = getSession().createQuery(queryString);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	public Role merge(Role detachedInstance) {
		log.debug("merging Role instance");
		try {
			Role result = (Role) getSession().merge(detachedInstance);
			log.debug("merge successful");
			getSession().flush();
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(Role instance) {
		log.debug("attaching dirty Role instance");
		try {
			getSession().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(Role instance) {
		log.debug("attaching clean Role instance");
		try {
			getSession().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}
	

	/**
	 * 根据condition对角色表查询
	 * @param instance
	 * @return
	 */
	public List<Role> findByExample(List<Condition> conditions) {
		log.debug("finding role instance by example");
		try {
			 
			Criteria criteria= getSession()
					.createCriteria(Role.class);
			//设置查询条件
			BaseHibernateDAO.addCriteria(conditions, criteria);
			
			List<Role> results = criteria.list();
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}
	/**
	 * 分页查询角色表
	 */
	public List<Role> findByExample4Page(List<Condition> conditions, int page, int pageSize) {
			log.debug("finding User instance by example");
			try {
				Criteria criteria= getSession()
					.createCriteria(Role.class);
				//设置查询条件
				BaseHibernateDAO.addCriteria(conditions, criteria);
				criteria.setFirstResult(page);
				criteria.setFetchSize(pageSize);
				List<Role> results =criteria.list();
				
				log.debug("find by example successful, result size: "
						+ results.size());
				return results;
			} catch (RuntimeException re) {
				log.error("find by example failed", re);
				throw re;
			}
		}
	private static RoleDAO roleDao = null;
	
	
	public static  RoleDAO getRoleDAO(){
		if(null == roleDao) {
			roleDao = new RoleDAO();
		} 
		return roleDao;
	}
	
}